Originally Posted by Brazle
Below I've shown a quick plot of one RSS390-HO in a 2.7cuft vented at 21hz vs one PA460 in a 7cuft vented at 21Hz. The RSS390 has 800 watts, the PA460 has 500 watts.
So, with the RSS390, you'll need more watts to get the same output, but with the PA460, you'll need a box twice as big. So it's up to you. The 390 may be able to dig a little deeper, with it's higher excursion, and being designed for lower end duty (FS = 19.5Hz) (vs PA460 Fs = 28.5Hz).
I've personally looked at those RSS drivers lately, and would love to build a couple boxes. Maybe sealed, maybe with Passive Radiators. ... Where did you find that deal??? Private sale?
Originally Posted by LTD02
sketching with some broads strokes here, but the 390HF may be a better choice for a small sealed cab (3c.f. or so) and want a little more low end extension, but just a little. the PA460 is the better choice if you can go with a medium to large ported cab. it will give up a couple db bottom end in exchange for a whole lot more top end 6db or so. folks have built a variety of subs using each driver with good results and not always limited to these examples. the 390hf is a also good choice for the f20 horn if you want to go that route. :-)
One specific spot I have for a sub i can fit a ~24in-20in-20in (5.5cuft) box- under the bottom floating shelf pictured. That is definitely ideal spot numero uno. I could buy both those 390HF drivers as well. I understand the benefits of a bigger ported box but right now i can't put a big whopper in our room, so i'd have to keep it to the #1
sub max at 5.5cuft and a second not much bigger (preferably even smaller). My room is just about 3000cuft with one opening up to a hallway. I believe i mentioned this is for %90 movies and gaming, so i'd really like to hit those lower frequencies and get some punch out of it.
With my room parameters what would you recommend for a single sub setup?
I was also contemplating a single box with a driver facing the seating area and one facing the fireplace- Would two drivers in a single box provide enough benefit to make the added expense worth it, sealed or ported?
I'm not familiar with passive radiators, would this be a good application for them?
How about a 2 sub setup-
If sealed subs would be have a smaller footprint, would 2 sealed subs with these configurations be sufficient? Would i be missing much not going with ported or would 2 ported at this size (5.5cuft) be better?
Also- is mixing a ported and sealed sub okay, or does having two different kinds lead to equalization issues?
If this is too much for this thread, i can start mine own as well.